#include<bits/stdc++.h>
#define int long long 
using namespace std;
namespace IO{
    char buff[1<<21],*p1=buff,*p2=buff;
    char getch(){
        return p1==p2&&(p2=((p1=buff)+fread(buff,1,1<<21,stdin)),p1==p2)?EOF:*p1++;
    }
    template<typename T>
    void read(T &x){
        char ch=getch();int fl=1;x=0;
        while(ch>'9'||ch<'0'){if(ch=='-')fl=-1;ch=getch();}
        while(ch<='9'&&ch>='0'){x=x*10+ch-48;ch=getch();}
        x*=fl;
    }
    template<typename T,typename ...Args>
    void read(T &x,Args& ...args){
        read(x);read(args...);
    }
    char obuf[1<<21],*p3=obuf;
    void putch(char ch){
        if(p3-obuf<(1<<21))*p3++=ch;
        else fwrite(obuf,p3-obuf,1,stdout),p3=obuf,*p3++=ch;
    }
    char ch[100];
    template<typename T>
    void write(T x){
        if(!x)return putch('0');
        if(x<0)putch('-'),x*=-1;
        int top=0;
        while(x)ch[++top]=x%10+48,x/=10;
        while(top)putch(ch[top]),top--;
    }
    template<typename T,typename ...Args>
    void write(T x,Args ...args){
        write(x);write(args...);
    }
    void flush(){fwrite(obuf,p3-obuf,1,stdout);}
}
using namespace IO;
const int N=1e5+5;
int n,rt;
int a[N];
vector<int>to[N];
void dfs(int x,int fa){
	if(to[x].size()==1)return;
	int sum=0,maxn=0,cnt;
	for(auto y:to[x]){
		if(y==fa)continue;
		dfs(y,x);
		if(a[y]==-1)return void(a[x]=-1);
		sum+=a[y];
		maxn=max(maxn,a[y]);
	}
	if(maxn>=sum/2)cnt=sum-maxn;
	else cnt=sum/2;
	if(a[x]>sum)return void(a[x]=-1);
	if(cnt<sum-a[x])return void(a[x]=-1);
	a[x]-=sum-a[x];
	if(a[x]<0)return void(a[x]=-1);
	return;
}
void sol(){
	read(n);
	for(int i=1;i<=n;i++)read(a[i]);
	for(int i=2;i<=n;i++){
		int x,y;
		read(x,y);
		to[x].push_back(y);
		to[y].push_back(x);
	}
	for(int i=1;i<=n;i++)if(to[i].size()!=1)rt=i;
	dfs(rt,0);
	if(a[rt]==0)putch('Y'),putch('E'),putch('S'),putch('\n');
	else putch('N'),putch('O'),putch('\n');
	for(int i=1;i<=n;i++)to[i].clear();
}
signed main(){
	freopen("clean.in","r",stdin);
	freopen("clean.out","w",stdout);
	int T;read(T);
	while(T--)sol(); 
	flush();
	return 0;
}

